Attachment for oil burners



Aug. 6, 1957 2 Sheets-Sheet 1 Filed Sept. 16, 1955 INVENTOR ATTORNEYS United States Paten p ATTACHMENT FOR OIL BURNERS Charles Funderwhite, Collegeviiie, Pa.

Application September 16, 1955, Serial No. 534,829

1 Claim. (Cl. 137-62546) This invention relates to an attachment for an oil burner for regulating the air which passes through the burner to the boiler.

An object of this invention is to provide an attachment for an oil burner whereby the air will be automatically cut off from the burner and boiler when the burner is inoperative.

Another object of this invention is to provide an automatically operable air valve which is normally closed and is electro-magnetically moved to an open position when the blower "and burner are operative.

A further object of this invention is to provide an improved air intake valve which is of simple construction and will operate automatically to admit air to the blower when the blower is operating and to automatically cut off air through the blower when the blower and the burner are inoperative.

With the foregoing and other objects in view which will appear as the description proceeds, the invention consists of certain novel details of construction and combinations of parts, hereinafter more fully described and pointed out in the claims, it being understood that changes may be made in the construction and arrangement of parts without departing from the spirit of the invention as claimed.

Referring to the drawing:

Figure 1 is a detailed side elevation of a combined blower and air pump having an air regulating valve connected with the blower constructed according to an embodiment of this invention.

Fig. 2 is a sectional view taken on line 2-2 of Fig. 1.

Fig. 3 is a sectional view taken on line 33 of Fig. 1.

Fig. 4 is a sectional view taken on line 4-4 of Fig. 3.

Referring to the drawing, the numeral designates generally an oil pump of conventional construction which is operated beyond a motor 11. The pump 10 has an inlet pipe or suction line 12 connected thereto and also has an exhaust or pressure pipe 13 connected thereto. A blower 14 is connected to the motor 11 between the motor and the pump 10. The blower 14 has a discharge side 15 connected thereto and the air is taken into the center portion of the blower 14. In order to provide a means whereby the air is regulated in accordance with the operation of the motor 11 and the pump 10, I have provided an air intake valve which includes a cylindrical member 16 which is formed at the opposite ends thereof with flanges 17 and 18. The cylindrical member 16 is formed with a series of spaced air intake ports 19 for admitting air into the center of the blower 14. A cylindrical valve or sleeve 20 is rotatably disposed about the cylindrical member 16 and is formed with a plurality of air ports 21 which are normally disposed in a position out of register with the ports 19. The inner flange 18 has an inwardly projecting lug 22 fixed thereto and the valve 20 has an outwardly projecting lug 23 fixed relative thereto. A

2,801,646 Fatented Aug. 6, 1957 spring 24 is connected between the lugs 22 and 23 and normally urges the movable valve sleeve 20 to a port closing position. The movement of valve sleeve 20 is adapted to be limited by means of a lug 25 which is fixed to the sleeve 20 and is adapted to engage a stop screw 26 which is threaded through a lug 27 carried by the flange 18. When the movement of the valve sleeve 20 is reversed from its normal counter-clockwise movement to a port-closing position the stop screw 26 may be extended through a second lug 28, as shown in Fig. 3. The valve structure herein described is secured to a cylindrical intake flange 29 carried by the blower 14-, the valve structure being secured by means of set screws 36 extending through flange 18, as shown in Fig. 4. The movable valve member 20 is automatically moved to an open position by means of a solenoid generally indicated at 31. The solenoid 31 includes a coil 32 having a sliding core 33. The core 33 moves in a guide 34 extending from one end of the coil 32. An upwardly projecting arm 35 is fixed to the valve 20 and is connected by means of spring 36 to the movable core 33. The solenoid 31 is supported from the valve structure by means of a supporting bar 37 formed with a downturned end 38 fixed relative to the flange 18.

In use and operation of this attachment, the valve structure is mounted by means of the bolts 30 on the annular flange 29 of the blower structure or housing. The oil pump 10 is attached to the flange 17 and the motor shaft 39 extends centrally through the valve structure and is connected with the blower 14 and the motor 11. When the motor 11 is in operation for pumping oil under pressure from pump 10 to the oil burner, blower 14 will be operated and at this time solenoid 31, which is connected in circuit with motor 11, will be energized. When solenoid 31 is energized core 33 will be drawn inwardly so that valve sleeve 20 will be disposed in port-opening position. So long as motor 11 is operated air will pass through ports 21 and 19 into the blower. However, when the motor 11 is deenergized solenoid 31 will be deenergized and valve member 20 will be moved by means of spring 24 to a port closing position. Air will, therefore, be cut off from blower 14 to the boiler so that the boiler will not be cooled down by any air drawn by natural draft through blower 14 into the boiler. This attachment will, therefore, provide a means whereby the boiler will be kept in a heated condition a longer period of time by reason of the fact that no cooling air is drawn through the blower and through the boiler.

What is claimed is:

An air intake attachment for mounting on the blower of an oil burner comprising a cylindrical intake member, a flange at the inner end of said member, said member having a plurality of air intake ports, a cylindrical valve rotatable about said member, said valve having intake ports for selective registry with the ports of said member, a lug carried by said flange, a second lug carried by said valve, a spring secured between said lugs normally urging said valve to closed position, an. electro-magnetic operator connected with said valve for rotating said valve to open position a stop lug carried by said valve, a pair of lugs carried by said flange and confronting screws threaded through said pair of lugs between which said stop lug engages for limiting the rotation of said valve in either direction.

References Cited in the file of this patent UNITED STATES PATENTS 2,603,411 Trumpa July 15, 1952 

